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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@fanoush
That post you linked is excellent summary, thank you. Of course the calibration takes power, nice someone took care to compute that part too.
BTW if schematics in the Holyot YJ-17095 page is correct the DCDC should be supported there. It saves most power when current is high = bluetooth transmit. Now found source for information in that article I linked previously here https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/optimizing-power-on-nrf52-designs
For enabling DCDC define
ESPR_DCDC_ENABLEas checked here https://github.com/espruino/Espruino/blob/99541c982aeef8114374cc673919fc42f1f874c7/targets/nrf5x/bluetooth.c#L2458